方案1：controller里添加一个"/"的映射路径

@RequestMapping("/")public String index(Model model, HttpServletResponse response) {  model.addAttribute("name", "simonsfan");  return "/index";}

方案二：设置默认的View跳转页面

@Configurationpublic class DefaultView extends WebMvcConfigurerAdapter {  @Override  public void addViewControllers(ViewControllerRegistry registry) {    registry.addViewController("/").setViewName("index");    registry.setOrder(Ordered.HIGHEST_PRECEDENCE);    super.addViewControllers(registry);  }}

如上两种方式均可实现在springboot中设置默认页面跳转。

ps：SpringBoot设置默认首页

@Configurationpublic class DefaultView extends WebMvcConfigurerAdapter{  @Override  public void addViewControllers(ViewControllerRegistry registry) {    super.addViewControllers(registry);    //主页    registry.addViewController("/").setViewName("forward:/index");  } }